Commit cab056226f removed the tryReadonlyMounts
utility, in favor of mounts.ReadOnlyMounts() that was added in commit
daa3a7665e.
That change made part of the comment redundant, because mounts.ReadOnlyMounts
handles both overlayfs read-only mounts (by skipping the workdir mounts), and
sets the "ro" option for other mount-types, but the reason why we're using a
read-only mount is still relevant, so restoring that part of the comment.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
cb2c3ec8f8